feat!: Replace defaultOptions with addOptions (#2088)

* add new addOptions option

* replace defaultOptions with addOptions for all extensions

* replace defaultOptions with addOptions for all demos

* replace defaultOptions with addOptions in docs

* refactoring

* refactoring

* drop object support for addOptions

* fix optional options

* fix tests

packages/extension-image/src/image.ts

@@ -25,9 +25,11 @@ export const inputRegex = /(!\[(.+|:?)]\((\S+)(?:(?:\s+)["'](\S+)["'])?\))/
 export const Image = Node.create<ImageOptions>({
   name: 'image',
 
-  defaultOptions: {
-    inline: false,
-    HTMLAttributes: {},
+  addOptions() {
+    return {
+      inline: false,
+      HTMLAttributes: {},
+    }
   },
 
   inline() {